The von Trapp children with screen dad Christopher Plummer in the 1965 movie

Despite Liesl being “16 going on 17” the star was 23 when she beat Mia Farrow and Geraldine Chaplin to the role but she retired from acting soon afterwards to raise her two daughters and open her own interior design store in California.

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Charmian Carr starred at Liesl in the movie

But what became of the other six von Trapps in the 50 years since the classic movie, starring Julie Andrews and Christopher Plummer, was released?

Here’s what those singing siblings are up to now.

Nicholas Hammond: Friedrich von Trapp

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Nicholas Hammond is still acting today

Nicholas played the second child, 14-year-old Friedrich and unlike many of hiw screen siblings, he stayed in the acting business. In the late seventies he took the starring role in The Amazing Spider-Man on TV, and even showed up in Dallas, in 1982, playing Bill Johnson.

His most recent he starred in the 2015 mini-series Gallipoli as Henry Nevinson.

He has remained close to all his The Sound of Music co-stars and was very fond of Charmian Carr.

Heather Menzies: Louisa von Trapp

Heather Menzies was Louisa the wilful third child

Heather was born in Toronto and made her film debut, at 13, as Louisa von Trapp.

She went on to star in various TV shows, including classic sci-fi series Logan’s run, in which she played Jessica, and she also modelled for Playboy.

After a failed marriage to John Cluett she met her second husband, actor Robert Urich, while making a corned beef commercial and they married in 1975.

She stepped away from the limelight to raise her three kids and is now a grandmother.

Duane Chase: Kurt von Trapp

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Duane quite acting to become a computer whizz

Duane was born in Los Angeles and started acting at the age of 11 but, after starring in The Sound Of Music he turned his back on acting to finish his education.

After High School he joined the United States Forest Service, where he fought forest fires, before going back to University to gain a master's degree in geology.

Now 65, he designs computer software for oil and mining companies and lives near Seattle.

Angela Cartwright: Brigitta Von Trapp

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Brigitta was played by Angela Cartwright

The only British von Trapp, Angela was born in Cheshire in 1952 but moved to the US at a young age to appear in TV series Make Room For Daddy.

After landing the role of Brigitta in the movie, at the age of 12, she went on to star in hit TV series Lost in Space from 1965–1968 and was cast in the television movies Scout's Honor in 1980.

She has been married to actor and producer Steve Gullion for 40 years and they have two children.

Her acting career tailed off in the 1980s and she is now an artist who displays her work at Studio City, Los Angeles.

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Debbie Turner: Marta von Trapp

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Debbie Turner was sixth child Marta

Debbie Turner played six-year-old Marta von Trapp in the movie, the first child to take to Maria.

Although she had been acting in commercials from the age of six months, she gave up showbiz straight after the movie to concentrate on studying.

After graduating from college in California she worked in a ski resort where she met her husband Rick Larson. They married in 1980.

The couple have four daughters and live in Minesotta where Debbie runs her own loral and event design company now known as Debbie Turner Originals.

Kym Karath: Gretl Von Trapp

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Little Gretl was the youngest of the singing clan, played by Kym Karath

The cutest little von Trapp of the lot. Kym was six when she landed the role of Gretl but she was already an established actor, having starred in Spencer's Mountain with Henry Fonda at the age of three.

After The Sound of Music she went on to act in various US TV series including Family Affair, The Brady Bunch and Lost in Space.

Kym is said to be currently working on several new upcoming films.

The Von Trapp family sing So Long in the classic movie The Sound of Music